diff options
Diffstat (limited to 'frontends')
| -rw-r--r-- | frontends/ast/ast.cc | 5 | ||||
| -rw-r--r-- | frontends/ast/ast.h | 2 | ||||
| -rw-r--r-- | frontends/ast/genrtlil.cc | 19 | ||||
| -rw-r--r-- | frontends/ast/simplify.cc | 4 |
4 files changed, 17 insertions, 13 deletions
diff --git a/frontends/ast/ast.cc b/frontends/ast/ast.cc index cec199b6..5b3214f5 100644 --- a/frontends/ast/ast.cc +++ b/frontends/ast/ast.cc @@ -181,6 +181,7 @@ AstNode::AstNode(AstNodeType type, AstNode *child1, AstNode *child2) is_signed = false; is_string = false; range_valid = false; + range_swapped = false; port_id = 0; range_left = -1; range_right = 0; @@ -276,7 +277,7 @@ void AstNode::dumpAst(FILE *f, std::string indent) if (port_id > 0) fprintf(f, " port=%d", port_id); if (range_valid || range_left != -1 || range_right != 0) - fprintf(f, " range=[%d:%d]%s", range_left, range_right, range_valid ? "" : "!"); + fprintf(f, " %srange=[%d:%d]%s", range_swapped ? "swapped_" : "", range_left, range_right, range_valid ? "" : "!"); if (integer != 0) fprintf(f, " int=%u", (int)integer); if (realvalue != 0) @@ -620,6 +621,8 @@ bool AstNode::operator==(const AstNode &other) const return false; if (range_valid != other.range_valid) return false; + if (range_swapped != other.range_swapped) + return false; if (port_id != other.port_id) return false; if (range_left != other.range_left) diff --git a/frontends/ast/ast.h b/frontends/ast/ast.h index 8253a205..6c15c03a 100644 --- a/frontends/ast/ast.h +++ b/frontends/ast/ast.h @@ -151,7 +151,7 @@ namespace AST // node content - most of it is unused in most node types std::string str; std::vector<RTLIL::State> bits; - bool is_input, is_output, is_reg, is_signed, is_string, range_valid; + bool is_input, is_output, is_reg, is_signed, is_string, range_valid, range_swapped; int port_id, range_left, range_right; uint32_t integer; double realvalue; diff --git a/frontends/ast/genrtlil.cc b/frontends/ast/genrtlil.cc index 8ee46eb8..5545fc16 100644 --- a/frontends/ast/genrtlil.cc +++ b/frontends/ast/genrtlil.cc @@ -786,13 +786,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint) log_error("Signal `%s' with non-constant width at %s:%d!\n", str.c_str(), filename.c_str(), linenum); - bool wire_upto = false; - if (range_left < range_right && (range_left != -1 || range_right != 0)) { - int tmp = range_left; - range_left = range_right; - range_right = tmp; - wire_upto = true; - } + log_assert(range_left >= range_right || (range_left == -1 && range_right == 0)); RTLIL::Wire *wire = current_module->addWire(str, range_left - range_right + 1); wire->attributes["\\src"] = stringf("%s:%d", filename.c_str(), linenum); @@ -800,7 +794,7 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint) wire->port_id = port_id; wire->port_input = is_input; wire->port_output = is_output; - wire->upto = wire_upto; + wire->upto = range_swapped; for (auto &attr : attributes) { if (attr.second->type != AST_CONSTANT) @@ -918,17 +912,20 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint) children[0]->children[1]->clone() : children[0]->children[0]->clone()); fake_ast->children[0]->delete_children(); RTLIL::SigSpec sig = binop2rtlil(fake_ast, "$shr", width, - fake_ast->children[0]->genRTLIL(), fake_ast->children[1]->genRTLIL()); + fake_ast->children[0]->genRTLIL(), !wire->upto ? fake_ast->children[1]->genRTLIL() : + current_module->Sub(NEW_ID, RTLIL::SigSpec(wire->width - width), fake_ast->children[1]->genRTLIL())); delete left_at_zero_ast; delete right_at_zero_ast; delete fake_ast; return sig; } else { - chunk.offset = children[0]->range_right - id2ast->range_right; - chunk.width = children[0]->range_left - children[0]->range_right + 1; if (children[0]->range_left > id2ast->range_left || id2ast->range_right > children[0]->range_right) log_error("Range select out of bounds on signal `%s' at %s:%d!\n", str.c_str(), filename.c_str(), linenum); + chunk.width = children[0]->range_left - children[0]->range_right + 1; + chunk.offset = children[0]->range_right - id2ast->range_right; + if (wire->upto) + chunk.offset = wire->width - (chunk.offset + chunk.width); } } diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc index 2a55adef..7aa6d24c 100644 --- a/frontends/ast/simplify.cc +++ b/frontends/ast/simplify.cc @@ -504,6 +504,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, if (type == AST_RANGE) { bool old_range_valid = range_valid; range_valid = false; + range_swapped = false; range_left = -1; range_right = 0; log_assert(children.size() >= 1); @@ -525,6 +526,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, int tmp = range_right; range_right = range_left; range_left = tmp; + range_swapped = true; } } @@ -535,6 +537,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, if (!range_valid) did_something = true; range_valid = true; + range_swapped = children[0]->range_swapped; range_left = children[0]->range_left; range_right = children[0]->range_right; } @@ -542,6 +545,7 @@ bool AstNode::simplify(bool const_fold, bool at_zero, bool in_lvalue, int stage, if (!range_valid) did_something = true; range_valid = true; + range_swapped = false; range_left = 0; range_right = 0; } |